Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. A large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle.

What experimental evidence led to the development of this atomic model from the one before it?

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.